Methods and apparatus for determining dimensions of an item using 3-dimensional triangulation

摘要

Methods and apparatus are provided for determining the dimensions of an unknown item using multiple images captured by different cameras. The dimensions include the height, length and width of the item. The dimensions are used to reduce the universe of possible candidates that would identify the unknown item. The methods use multiple reference planes and projects elements of the item onto the one or more of the reference planes to determine the coordinates of the elements of the item. Once the coordinates are determined, the dimensions of the items are determined.

主权项

1. A computer implemented method for determining dimensions of an unknown item by a scanner during a purchase transaction, the method comprising:
receiving a first image of the item captured by a first camera of the scanner; identifying a first top corner of the item in the first image; determining a first point on a first reference plane that correlates to the identified first top corner; receiving a second image of the item captured by a second camera of the scanner; identifying the first top corner of the item in the second image; determining a second point on a second reference plane that correlates to the identified first top corner in the second image; determining a first dimension of the item using the first and second points and the location of the first and second cameras; and using the first dimension of the item to identify the item for inclusion in the purchase transaction.